ca.uhn.fhir.util.VersionUtil.java Source code

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Here is the source code for ca.uhn.fhir.util.VersionUtil.java

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package ca.uhn.fhir.util;

/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2016 University Health Network
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.io.InputStream;
import java.util.Properties;

import org.apache.commons.io.IOUtils;

/**
 * Used internally by HAPI to log the version of the HAPI FHIR framework
 * once, when the framework is first loaded by the classloader.
 */
public class VersionUtil {

    private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
    private static String ourVersion;

    static {
        initialize();
    }

    public static String getVersion() {
        return ourVersion;
    }

    private static void initialize() {
        InputStream is = null;
        try {
            is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties");
            Properties p = new Properties();
            p.load(is);
            ourVersion = p.getProperty("version");
            ourLog.info("HAPI FHIR version is: " + ourVersion);
        } catch (Exception e) {
            ourLog.warn("Unable to determine HAPI version information", e);
        } finally {
            IOUtils.closeQuietly(is);
        }
    }

}